Hydroxypropyl methyl cellulose
Kuisa bvunzo yenguva
Nguva yekugadzika kwekongiri inonyanya kuenderana nenguva yekugadzika kwesimende, kukanganiswa kwesendi hakuna kukura, saka nguva yekugadzika kwekongiri inogona kushandiswa panzvimbo pekudzidza HPMC yenguva yekugadzika kongiri pasi pemvura, simba rekusanganiswa nekuda kwenguva yekugadzika nechiyero chemvura nesimende yekongiri, simba rejecha resimende, saka kuti tiongorore simba reHPMC panguva yekugadzika kongiri, chiyero chemvura nesimende uye chiyero chejecha resimende chekongiri chinofanira kugadziriswa.
HPMC chimiro che macromolecule linear, chine hydroxyl group paboka rinoshanda, iro rinogona kuumba hydrogen bonds nema mixing water molecules uye kuwedzera viscosity ye mixing water. HPMC marefu mamorekuru cheni achakwezvana, kuitira kuti ma HPMC molecules abatanane kuti agadzire network structure, simende, mixing water pulled. Nekuti HPMC inoumba network structure yakafanana ne thin film uye wrapping effect ye simende, inodzivirira zvinobudirira evaporation yehunyoro mu mortar, inokanganisa kana kuderedza hydration rate ye simende.
Kuyedzwa kwekurasa mvura
Kubuda kwemvura mudhaka kwakafanana nekwekongiri, izvo zvinozokonzera kugara kwakasimba, zvichikonzera kuwedzera kwehuwandu hwemvura nesimende yedanho repamusoro redhaka, uye zvinoita kuti danho repamusoro redhaka rive nepurasitiki yakawanda kana kutotsemuka pakutanga, uye simba redanho repamusoro redhaka rive risina kusimba. Kubva mukuyedza, zvinogona kuonekwa kuti kana huwandu hwekusanganisa huri pamusoro pe0.5%, hapana chiitiko chekubuda kwemvura. Izvi zvinodaro nekuti kanaHPMCKana yasanganiswa kuita dhaka, HPMC ine firimu uye network structure, pamwe nekunyungudika kwehydroxyl pachain refu yemacromolecules, kuitira kuti simende iri mudhaka nemvura inosanganiswa iite flocculation, kuitira kuti chimiro chedhaka chigadzikane. Mushure mekuwedzera HPMC mudhaka zvakare, mabhuru madiki akawanda akazvimiririra achaumbwa. Mabhuru aya achagoverwa zvakaenzana mudhaka uye anodzivisa kuiswa kweaggregate. HPMC mashandiro ehunyanzvi emidziyo yakagadzirwa nesimende ane simba guru, anowanzo shandiswa kugadzirira senge dhaka rakaoma, dhaka repolymer nezvimwe zvinhu zvitsva zvakagadzirwa nesimende, kuitira kuti ive nekuchengetedza mvura kwakanaka, plasticity.
Nguva yekutumira: Kubvumbi-26-2024